Use the linear approximation (1 + x)k ? 1 + kx, as specified.Find an approximation for the function f(x) = 
for values of x near zero.
A. f(x) ? 1 + 2x
B. f(x) ? 1 - 2x
C. f(x) ? 2 - 2x
D. f(x) ? 2 + 2x
Answer: D
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Use Newton's Law of Cooling to solve the problem.A cup of coffee with temperature 104°F is placed in a freezer with temperature 0°F. After 5 minutes, the temperature of the coffee is 70.1°F. What will its temperature be 20 minutes after it is placed in the freezer? Round your answer to the nearest degree.
A. 21°F B. 18°F C. 17°F D. 20°F
Evaluate the exponential form.
3
A. 
B. 3
C. 
D. 
Transform the polar equation to an equation in rectangular coordinates. Then identify and graph the equation.r = 3 
A. 
2 + y2 = 
; circle,
radius 
, center at 
in
rectangular coordinates
B. 
x = 3; vertical line 3 units to the right
of the pole
C. 
x2 + 
2 = 
; circle,
radius 
, center at 
in
rectangular coordinates
D. 
x2 + y2 = 9; circle, radius 3,
center at pole
Solve the inequality using a sign chart.-7x2 - 6 ? -23x
A. x ? 
or x ? 3
B. 
? x ? 3
C. x > 3
D. x ? 